Field intelligent single-phase electric energy meter fault diagnosis instrument

The invention provides a field intelligent single-phase electric energy meter fault diagnosis instrument. According to the field intelligent single-phase electric energy meter fault diagnosis instrument provided by the invention, when a user does not use electricity or a current signal acquired by a current clamp is almost zero, the fault diagnosis instrument can automatically close a magnetic latching relay, an output end of an isolation power supply unit generates a virtual load current, and current sampling can be completed by an intelligent single-phase electric energy meter to be tested and the fault diagnosis instrument. The field intelligent single-phase electric energy meter fault diagnosis instrument can solve the problem that wiring is complex when a user does not use electricity and needs to be externally connected with an electricity load, meet the requirement for on-site fault diagnosis in time, and greatly improves the working efficiency of on-site electric power operation and maintenance person